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Showing 1 to 18 of 18 for “"male competition"”.
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The Role of Male Vocal Signals During Male-Male Competition and Female Mate Choice in Greater Prairie-Chickens (<i>Tympanuchus cupido</i>)
… role in aggression, territorial defense, and female choice. The acoustic structure of vocalizations is influenced by physical constraints on the vocalizer, suggesting a potential for discrimination among individuals. In the lek-mating Greater Prairie-Chicken (<i>Tympanuchus cupido</i>), male …
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The role of male-male aggressive signals in reproductive isolation between two hybridizing warblers
… the dynamics of the hybrid zone, both via female mate choice and male-male competition. In many species the same song functions for both female mate choice and male-male competition. However, some species, such as the Parulidae Warblers, sing songs with specific functions, where one song is …
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Speciation and the evolution of male breeding coloration in darters
… spectabile). First, I quantified variation in male breeding coloration across multiple populations of E. caeruleum and E. spectabile using digital photography and image processing software. Male color traits in both species can be categorized as “blue” and “red” components, which are based on …
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Male reproductive success and population control in the Mediterranean fruit fly, ceratitis capitata
The traits that determine male reproductive success in Ceratitis capitata (medfly) are largely unknown. This comes despite decades of research into the reproductive behaviour of this agricultural pest. An understanding of what makes a successful male is of great importance in this lekking species, …
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After all, what do wasps want? The choice of sexual partner in the paper wasps Polistes
… fitness. This is particularly important when females are genetically monogamic and must store male sperm for a long time and when incestuous copulations may increase probability for the expression of recessive deleterious alleles. Social paper wasps like Polistes fit this situation, but …
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Comportamento reprodutivo de Phyllomedusa rohdei Mertens, 1926 (Amphibia, Anura, Hylidae), na região de Saquarema, Estado do Rio de Janeiro, Sudeste do Brasil
… from December to February (wet season). Females were larger and heavier than males. Males spent relatively few nights in activity call in the chorus, with respect to the length of the breeding season. The number of males and females present in the pond was positively correlated, but no …
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Behavioural, microhabitat, and phylogenetic dimensions of intrasexual contest competition in combatant monkey beetles (Scarabaeidae: Hopliini)
… overwhelmingly been studied in the context of female choice, but there is evidence that male-male competition can also drive evolution. Recent reviews of the intrasexual competition literature have developed several hypotheses of weapon divergence in both allopatry and sympatry and have suggested …
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Opercular Flaps as Sexual Ornaments For Male Longear Sunfish (Lepomis Megalotis)
… have been shown to influence mating success of male fishes. However, few examples of structural sexual ornaments exist in fishes, and ornamentation is typically limited to coloration. One possible example of a structural sexual ornament in a fish species may be the exaggerated opercular flaps of …
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Behavioral and genomic patterns of evolution during speciation via reproductive and agonistic character displacement
… caeruleum). I found behavioral evidence for male-driven RCD and ACD between multiple orangethroat species and their respective sympatric rainbow darter populations. When orangethroat and rainbow darters occur sympatrically, males prefer conspecific over heterospecific females and bias their …
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A Tale of Two Butterflies: The Effect of Larval Social Environment and Circadian Rhythms on Mating Behavior in Bicyclus anynana and Heliconius hewitsoni
… number of factors from sexual ornamentation to male-male competition; and, 2) when an organism courts, be it daily, monthly, or seasonally. Both aspects are especially important for gregarious species as mistakes in either can incur high costs to overall fitness. My research focuses on using …
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Sexual behaviour and sexual selection in newts
… of sexual selection, and those aspects of competition and mate choice relevant to newt sexual behaviour are discussed. In Chapter 2, observations and experiments are described which demonstrate inter male competition and mate choice in the smooth newt. Males interfere with one another's …
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Intrasexual selection and warning color evolution in an aposematic poison dart frog
… dissertation, I investigated the potential for male-male competition to impact the warning color evolution of a species of poison frog. I focused my work on an exceptionally bright and toxic population of the strawberry poison frog (Oophaga pumilio) where males are brighter than females, a …
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Extra-pair paternity within the female-defense polygyny of the lizard, Anolis carolinensis: Evidence of alternative mating strategies
Mate competition is a prominent component of sexual selection theory. Typically, males attempt to mate with the most females possible and females attempt to mate with the highest quality males possible. In the polygynous female-defense mating system of Anolis carolinensis, males compete directly …
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Sexual Selection and Mate Preference in Astatotilapia Burtoni
… variables can prime the social behaviors of males and females. Here we sought to better understand this phenomenon with two studies that ask the following questions: (1) Does social environment and rank shape spawning behaviors and outcomes of males? and (2) Does the visual ecology of females …
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Place Matters: An Evolutionary Approach to Annie Proulx's "The Half-Skinned Steer"and "Wamsutter Wolf"
In Annie Proulx's interview with Charlie Rose, she states that her stories come "from place." Ecocriticism has been the predominant lens with which to understand Proulx's work; however, ecocriticism's nebulous tenets and theoretical deficiencies perpetuate sentimental pastoralism of geographical …
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The Importance of the Multicomponent Display in Sexual Selection of Black Morph Girardinus metallicus (Pisces: Poeciliidae)
… courtship and aggressive display. Black morph males exhibit black ventral coloration including the gonopodium (copulatory organ) and yellow in the non-black areas of their bodies. I investigated the effects of common anesthetics on coloration measurements of <em>G</em>.<em> metallicus</em>. I …
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Unravelling the ecological trade-offs in behavioural and physiological sexual traits
… will have direct impacts on the risk of mate competition and the opportunity for mate choice. At the same time, biotic environmental changes in the environment could have impacts on nutritional availability, and therefore the condition state of individuals.<br/><br/>In Drosophila melanogaster, …
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An examination of kinanthropometric and physical injury risk factors in elite Australian football
… an athlete’s physical profile and readiness for competition. This typically includes a variety of different assessments which serve to quantify body shape, proportion, and composition in a bid to understand human physiology. Common assessments include stature, body mass, limb ratios, body …